docs(maintaining): add merge strategies section

Author: jsjoeio

CHANGELOG.md

@@ -69,6 +69,7 @@ VS Code v1.56
 
 - docs(install): add raspberry pi section #3376 @jsjoeio
 - docs(maintaining): add pull requests section #3378 @jsjoeio
+- docs(maintaining): add merge strategies section #3379 @jsjoeio
 
 ### Development
 

docs/MAINTAINING.md

@@ -9,6 +9,7 @@
     - [Project Boards](#project-boards)
   - [Versioning](#versioning)
   - [Pull Requests](#pull-requests)
+    - [Merge Strategies](#merge-strategies)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
@@ -70,3 +71,7 @@ The code-server project follows traditional [semantic versioning](ttps://semver.
 Ideally, every PR should fix an issue. If it doesn't, make sure it's associated with a version milestone.
 
 If a PR does fix an issue, don't add it to the version milestone. Otherwise, the version milestone will have duplicate information: the issue & the PR fixing the issue.
+
+### Merge Strategies
+
+For most things, we recommend "Squash and Merge". If you're updating `lib/vscode`, we suggest using the "Rebase and Merge" strategy. There may be times where "Create a merge commit" makes sense as well. Use your best judgement.